I wrote a python script to notify me via e-mail whenever something noteworthy is happening in the cluster. You can set up it up on as many of your cluster nodes as you like (with the minimum, of course, being 1), but be aware that it can get a bit chatty when something happens. I also threw in an selinux rule (which only works if your mail server uses port 25) just for kicks.
I’m not recommending that this be your primary means of cluster health information, but I have found it quite useful for when I am performing maintenance and also serves as a secondary emergency notification system.
Feel free to use or modify it in any form.
EDIT: Added to GitHub: https://github.com/gguillen/galeranotify